@article{322373,
      author = {Porter, Bernard.},
      url = {http://library.usi.edu/record/322373},
      title = {Empire and superempire : Britain, America and the world /},
      publisher = {Yale University Press,},
      recid = {322373},
      pages = {211 p. ;},
      address = {New Haven :},
      year = {2006},
}